THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves
Zhongyang Li(李忠洋)1,†, Qianze Yan(颜钤泽)1, Pengxiang Liu(刘鹏翔)2, Binzhe Jiao(焦彬哲)1, Gege Zhang(张格格)1, Zhiliang Chen(陈治良)1, Pibin Bing(邴丕彬)1, Sheng Yuan(袁胜)1, Kai Zhong(钟凯)3, and Jianquan Yao(姚建铨)3
1 College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 2 Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 3 College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China
Abstract We propose a novel scheme for THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves (HSWs). The repeated frequency conversions are accomplished by oscillations of Stoke waves in resonant cavity (RC) where low-order Stokes waves (LSWs) are converted to high-order Stokes waves again and again. The continuous frequency conversions are accomplished by optimized cascaded difference frequency generation (OCDFG) where the poling periods of the optical crystal are aperiodic leading to the frequency conversions from low-order Stokes waves to high-order Stokes waves uninterruptedly and unidirectionally. Combined with the repeated and continuous frequency conversions, the optical-to-THz energy conversion efficiency (OTECE) exceeds 26% at 300 K and 43% at 100 K with pump intensities of 300 MW/cm2.
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61735010, 31671580, and 61601183), Natural Science Foundation of Henan Province, China (Grant No. 162300410190), and Program for Science &Technology Innovation Talents in Universities of Henan Province, China (Grant No. 18HASTIT023).
Corresponding Authors:
Zhongyang Li
E-mail: thzwave@163.com
Cite this article:
Zhongyang Li(李忠洋), Qianze Yan(颜钤泽), Pengxiang Liu(刘鹏翔), Binzhe Jiao(焦彬哲), Gege Zhang(张格格), Zhiliang Chen(陈治良), Pibin Bing(邴丕彬), Sheng Yuan(袁胜), Kai Zhong(钟凯), and Jianquan Yao(姚建铨) THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves 2022 Chin. Phys. B 31 074209
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